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This package is an MVP (not yet stable), if you want to use it contact the team first.

• f-statistics is responsible for transporting statistics provided to it; for example response time statistics from f-http.

• It is likely the transportation method may change.

Benefits (Now)

• Hide away how statistics are transported from every day development.
• Ability to be flexible with where our statistics are transported.
• Ability for properties to be provided during initialisation, which are included in every publication.

Benefits (Soon)

• Batching options - to decrease network usage
• Sampling options - to increase scalability

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Usage

Installation

yarn add @justeat/f-statistics

Usage

• It is not possible to instantiate multiple versions of Just Log in a single website, so provide a prepared Just Log instance where you can, or initialise one yourself.

// Import the pre-requisite packages
import StatisticsModule from '@justeat/f-statistics';
import { justLog } from '@justeat/just-log';

// Initialise Just Log if one is not already available
justLog.forFeature({
    name: 'your website name',
    tenant: 'your tenant',
    version: 'your version number',
    environment: 'your environment name'
});

// Declare basic options
const statisticsConfiguration = {
    environment: 'your environment name',
    featureName: 'your website name',
    // optional batch logging config to overide the default values
    logsMaxByteSize: 2000,
    logsMaxLength: 5,
    logsIntervalTimer: 5000
};

// Optional (provide properties to publish with every statistic)
const baseProperties = {
  my_experiment_bucket: 'Bucket 1'
};

// Initialise a new instance of the statistics client
const statisticsClient = new StatisticsModule(justLog, statsConfiguration, baseProperties);

// Publish a statistic
statisticsClient.publish({
    measureOne: 'Test',
    measureTwo: 'test'
});

// Optionally (Nuxt) inject the statistics client into context
inject('statistics', statisticsClient);

Options

Options should be provided when initialising the statsModule Parameter | Required |Description | Type ------------- | ---- |------------- | ------------- environment | yes | The name of the environment being used | String featureName | yes | The name of your feature | String logsMaxByteSize | no | Total byte size of logs to store before triggering batch publishing | Number logsMaxLength | no | The number of logs to store before triggering batch publishing. Use 1 to publish immediately | Number logsIntervalTimer | no | Time in milliseconds to wait before publishing logs. Use 0 to disable batch publishing using timer | Number

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Client Methods

These are all of the methods exposed by f-statistics

Method	Description	Parameters	Example
publish	Transports a message containing the payload provided	object	publish('This is a message', { measureOne: 'test', measureTwo: 'test' });